8 check-ins related to "ticket-c8c0b78c84"

[be06861f3c]Closed-Leaf:
<pre>Minor additional fixes related to [c8c0b78c84]:
- Use _wsystem() in stead of system() on Windows
- Use g.argv[0] in stead of fossil_nameofexe() where only printing is involved
- Use fossil_nameofexe() where fossil_system() is involved
- Move the determination of the full windows path to fossil_nameofexec,
so g.argv[0] can always be the ...
(user: jan.nijtmans tags: ticket-c8c0b78c84)